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3 protocols using casein enzymic hydrolysate

1

Cultivation and Storage of C. violaceum

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The bacterial strain used in the study, C. violaceum 30191, was obtained from the Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures (DSMZ, Braunschweig, Germany). It was stored in 8% DMSO at −80 °C. Before each experiment, the strain was inoculated in Luria-Bertani Broth (LB)—1% Casein enzymic hydrolysate, 0.5% yeast extract, 1% NaCl, (HiMedia, Modautal, Germany), and maintained at 4 °C on Luria-Bertani Agar (LA)—1% Casein enzymic hydrolysate, 0.5% yeast extract, 1% NaCl, 0.15% agar (HiMedia, Modautal, Germany) slants. As a source of bacterial inoculum, before each experiment, the strain was incubated in LB, without shaking at 30 °C for 24 h.
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2

Fabrication of Asymmetric Membranes with Antimicrobial Properties

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Polyvinylidene uoride (MW = 573 KDa, Solef, Solvay, France), polyester fabric (Filtration Sciences Corporation, USA), N, N dimethyl formamide (Qualigen, India), D-(+)-Glucose anhydrous (Hi media, India), Graphene oxide (Sigma-Aldrich) and 2, 3, 5-Triphenyltetrazolium chloride (≥ 99.0% SIGMA, Life Science) were used to prepare the asymmetric membranes. Reverse osmosis treated water was used for the membrane preparation.
Nutrient Agar, Nutrient Broth, Luria-Bertani Broth and TCBS Agar (Hi media, India) were used for all microbiology studies. Escherichia coli (NCIM2065), Bacillus subtilis (NCIM2920), Vibrio cholerae (N16961), Vibrio parahaemolyticus (IDH02640), Vibrio campbellii, Vibrio harveyi, Vibrio proteolyticus (Isolated from seawater and identi ed in our laboratory) were used for testing and evaluating the vibrio kit. Also, commercial probiotic containing Paracoccus pantotrophus (PondDtox, Novozymes) was used to test the vibrio kit.
Casein enzymic hydrolysate, Yeast extract, Proteose peptone, Sucrose, Sodium thiosulphate, Sodium citrate, Sodium deoxycholate, Sodium chloride, Oxgall, Sodium lauryl sulphate, Bile salts and Potassium tellurite (HiMedia, India) were used to prepare Vibrio selective medium.
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3

Fabrication of Asymmetric Membranes with Antimicrobial Properties

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Polyvinylidene uoride (MW = 573 KDa, Solef, Solvay, France), polyester fabric (Filtration Sciences Corporation, USA), N, N dimethyl formamide (Qualigen, India), D-(+)-Glucose anhydrous (Hi media, India), Graphene oxide (Sigma-Aldrich) and 2, 3, 5-Triphenyltetrazolium chloride (≥ 99.0% SIGMA, Life Science) were used to prepare the asymmetric membranes. Reverse osmosis treated water was used for the membrane preparation.
Nutrient Agar, Nutrient Broth, Luria-Bertani Broth and TCBS Agar (Hi media, India) were used for all microbiology studies. Escherichia coli (NCIM2065), Bacillus subtilis (NCIM2920), Vibrio cholerae (N16961), Vibrio parahaemolyticus (IDH02640), Vibrio campbellii, Vibrio harveyi, Vibrio proteolyticus (Isolated from seawater and identi ed in our laboratory) were used for testing and evaluating the vibrio kit. Also, commercial probiotic containing Paracoccus pantotrophus (PondDtox, Novozymes) was used to test the vibrio kit.
Casein enzymic hydrolysate, Yeast extract, Proteose peptone, Sucrose, Sodium thiosulphate, Sodium citrate, Sodium deoxycholate, Sodium chloride, Oxgall, Sodium lauryl sulphate, Bile salts and Potassium tellurite (HiMedia, India) were used to prepare Vibrio selective medium.
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